199946505 has 16 divisors (see below), whose sum is σ = 348997824. Its totient is φ = 96943680.

The previous prime is 199946491. The next prime is 199946533. The reversal of 199946505 is 505649991.

It is not a de Polignac number, because 199946505 - 2⁵ = 199946473 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 605734 + ... + 606063.

It is an arithmetic number, because the mean of its divisors is an integer number (21812364).

Almost surely, 2^199946505 is an apocalyptic number.

199946505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

199946505 is a deficient number, since it is larger than the sum of its proper divisors (149051319).

199946505 is a wasteful number, since it uses less digits than its factorization.

199946505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211816.

The product of its (nonzero) digits is 437400, while the sum is 48.

The square root of 199946505 is about 14140.2441633799. The cubic root of 199946505 is about 584.7514028835.

The spelling of 199946505 in words is "one hundred ninety-nine million, nine hundred forty-six thousand, five hundred five".